Korean Stocks Tumble as SK Hynix Drops Almost 20%, AI Chip Rally Loses Steam

On July 29, 2026, Korean stocks came under heavy selling pressure after SK Hynix shares fell nearly 20%, erasing a large part of this year’s AI-driven gains. The decline came despite the chipmaker reporting record revenue and a sharp rise in quarterly profit. Investors had expected even stronger results, and the market responded quickly. The sell-off has renewed concerns about AI chip valuations and raised questions about whether the semiconductor rally has run ahead of fundamentals.

Why Korean Stocks Fell Sharply Despite Strong AI Demand?

Why Did SK Hynix Lead the Market Decline?

SK Hynix was at the centre of Wednesday’s sell-off after releasing its quarterly earnings on July 29, 2026. The company reported a 557% year-over-year increase in operating profit and record quarterly revenue, supported by strong demand for high-bandwidth memory (HBM) chips used in AI servers.

Even so, investors were looking for more. Earnings came in below consensus estimates, prompting heavy selling that pushed the stock down nearly 20% during the session before it recovered some of those losses. It was another reminder that markets respond to expectations as much as they do to financial performance. When expectations rise too far, even strong earnings can trigger a sell-off.

How Did the Kospi React?

The weakness quickly spread across South Korea’s broader market. Samsung Electronics also moved lower, putting additional pressure on the technology-heavy Kospi because of its large weighting in the index.

🚨 SOUTH KOREA'S MARKET IS CRASHING FASTER THAN IT DID DURING THE 2008 FINANCIAL CRISIS.

It is now just 16% away from surpassing 2008 crash.

During the financial crisis KOSPI crashed 57% over the period of 1 year. But right not kospi has crashed 41% in just 40 days.

₩2.5… pic.twitter.com/agPOxS9qwg

— The Macro Paper (@macropaperr) July 29, 2026

The Kospi briefly dropped 12.6% during the trading session before finishing around 6% lower. Analysts said much of the decline appeared to come from leveraged positions being unwound and forced selling, rather than any major change in the outlook for the country’s technology companies.

What Ended the AI Chip Rally?

Were Investors Expecting Even More?

Yes. AI-related semiconductor stocks had climbed sharply over recent months, leaving little room for disappointment. Investors wanted stronger forward guidance, larger shareholder returns, and clearer evidence that AI spending would continue at its current pace.

Instead, SK Hynix delivered excellent financial results that still failed to match market expectations. That difference triggered profit-taking across semiconductor stocks. Some analysts also pointed to concerns that large technology companies could slow AI infrastructure spending after making significant investments over the past year.

Is This a Global Semiconductor Trend?

The pressure was not limited to South Korea. Semiconductor shares across Asia also declined as investors reassessed valuations.

Another concern is growing competition from Chinese memory chip manufacturers. Investors are also questioning whether AI-related capital spending can continue at the same pace. Even so, demand for AI memory chips remains healthy, and many market analysts continue to expect long-term growth in AI infrastructure.

Latest Market Data and Key Numbers Investors Should Know

Recent trading data shows how quickly market sentiment shifted.

• Date: July 29, 2026
• SK Hynix: Shares fell nearly 20% during intraday trading after earnings.
• Operating profit: Rose 557% from a year earlier.
• Revenue: Reached a record quarterly high.
• Kospi: Dropped as much as 12.6% intraday before closing about 6% lower.
• Market value erased: Around $2.18 trillion was wiped from South Korean equities during the sell-off.
• Samsung Electronics: Also declined sharply, adding further pressure to the benchmark index.

While the decline appeared severe, many analysts said it reflected expensive valuations and leveraged selling rather than weaker demand for AI chips.

What This Means for Investors and the AI Semiconductor Industry?

Is This a Buying Opportunity or a Warning?

The recent correction suggests investors should pay closer attention to business fundamentals than short-term price movements. Demand for HBM chips remains strong, and SK Hynix continues to secure long-term supply agreements with major customers.

According to Meyka, the stock’s technical outlook has weakened after breaking important support levels below, although its longer-term AI growth story remains unchanged. Meyka’s AI stock analysis tool also points to solid earnings quality despite the recent volatility. Other market analysts believe future AI spending, customer demand, profit margins, and upcoming earnings reports will determine where the sector moves next.

SK Hynix Stock Snapshot

Short stock outlook (Meyka):

• Short-term trend: Bearish after the recent breakdown.
• Long-term outlook: Positive if demand for AI memory chips stays strong.

Technical analysis summary:

• Momentum has weakened following the sharp decline.
• The stock is trading below key support levels.
• A sustained recovery will likely depend on broader semiconductor sentiment and renewed institutional buying.

What Meyka says:

Meyka believes the recent sell-off reflects overly high market expectations rather than weakening AI fundamentals. The platform suggests investors monitor upcoming earnings from major AI companies before making long-term investment decisions.

Supporting analyst views:

Reuters and several global market strategists say the decline was largely driven by profit-taking and excessive leverage. They continue to view the long-term outlook for AI memory chips as positive.

Conclusion

The sharp decline in Korean stocks shows how quickly investor sentiment can change when expectations rise faster than earnings. SK Hynix still reported record financial results, but the market wanted stronger signs of future growth.

Short-term volatility may continue, yet demand for AI memory chips remains healthy. Investors will be watching AI spending, corporate earnings, and semiconductor demand closely to see whether this pullback is a temporary correction or the start of a longer reset.

Disclaimer:

The content shared by Meyka AI PTY LTD is for research and informational purposes only. Meyka is not a financial advisory service, and the information provided should not be treated as investment or trading advice.